Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Equity [Abstract]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	$ (164)		$ (164)		$ 0
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Unrealized Gain on Securities			2,869
Realized gain on sale of securities, net of tax			(561)
Other comprehensive income, net of reclassifications and tax			12,187
Unrealized Gain on Securities	14,495		14,495
Unrecognized Net Pension and Postretirement Costs			3,228
Other comprehensive income, net of reclassifications and tax			31
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(164)	$ 0	(164)	$ 0
Unrecognized Net Pension and Postretirement Costs	(3,197)		(3,197)
Accumulated Other Comprehensive Income (Loss)			(359)
Realized gain on sale of securities, net of tax			(561)
Other comprehensive income, net of reclassifications and tax			12,054
Accumulated Other Comprehensive Income (Loss)	$ 11,134		$ 11,134